Fix scoping issue
Fix scoping issue

If statements where not registered as creating a scope

pbrunet/pythran,hainm/pythran,pombredanne/pythran,artas360/pythran,artas360/pythran,pbrunet/pythran,serge-sans-paille/pythran,pombredanne/pythran,pombredanne/pythran,serge-sans-paille/pythran,hainm/pythran,artas360/pythran,hainm/pythran,pbrunet/pythran